Working principle:1,The high quality vacuum tubed absorb the solar autraviolet ray,then heat the cold water in the vacuum tube2,The hot water rise in the top of the water tank ,and the cold water sink to bottom then heat by solar collector.So the whole system is always circilating continuously 3,The electromagnetism or ball valve can perform the water supply automatically,the water in the tank is not sufficient,the electromagnetism valve will open its valve,the tap water flow in the water tank,if the water is full,it will close the valve automatically

----------------------------------------------------------------------------------------- Unpressure solar hot water heaters Feature:The Deno-NP003 type has the stainless shell,so it can be used in the acid rain area,Besides,it has 15years long life span,and the vacuum tubes can work individually,so if the only one of them can't work ,it won't influence on the others.The spare parts can be changed freely,it is suitable for the many resident buildings.

About Us

Haining Deno Solar Equipment Co.

Haining Deno Solar Equipment Co., Ltd. has been a professional manufacturer of solar water heaters and accessories for more than 10 years. Our factory is located in Yuanhua Town, Haining City, which is near Shanghai and Ningbo. The transportation is very convenient here with several highways across here and we are only 100km away from Shanghai. We have a very professional development, designing and production team. Our main products include Compact Non-pressurized Solar Water Heaters, Compact Pressurized Solar Water Heaters, Pre-Heated Solar Water Heaters, Project Solar Collectors, Split Pressurized Solar Collectors, Split Pressurized Solar Water Heaters and Accessories. We believe quality is our life. Therefore, we attained the certificates of CE, ISO9001:2000 and CCC. We are keeping on providing the best products for our customers. We sincerely welcome our friends from domestic and overseas markets to cooperate with us for the future of our earth

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